- The Adriatic Sea: Located to the east, it forms part of the Mediterranean Sea and is bordered by Italy to the west, Slovenia, Croatia, Bosnia and Herzegovina, Montenegro and Albania to the east.
- The Ionian Sea: Situated to the south, it is also a part of the Mediterranean Sea and lies between Italy to the west, Albania and Greece to the east, and Libya to the south.
- The Ligurian Sea: Found in the northwest, it is part of the Mediterranean Sea and is bordered by Italy to the east and south, France to the west and Monaco to the east.
- The Tyrrhenian Sea: Located to the west, it is a part of the Mediterranean Sea and is bordered by Italy to the east and south, France and Corsica to the west, and Sardinia and Sicily to the north.